Moreover, what could be seen as a negative consequence of disordered sleeping, “Overtired without good reason”, that was present in one quarter of the participants at baseline reduced sig- nificantly as well.
Two forms of sleep problems were uncommon among our patients: “Sleeps more than most kids” and “talks or walks in sleep”. “Sleeps more than most kids” did not reduce significantly across time, which “talks or walks in sleep” did (Table 1).
Patients who did not respond to CBT (CY-BOCS scores fol- lowing treatment were 16 or higher) had at least one persistent severe/frequent sleep problem (19.2%), something which was less common in CBT responders (6.9%) ( 2 (1197) = 6.383, p = .012). However, sleep problems were still common, as a majority had at least one residual mild/infrequent or severe sleep problem in both groups (responders 46.9% and non-responders 65.4%, 2 (1197) = 5.525, p = .022), while only 34.6% of responders and 53.1% of the non-responders had no sleep problems at all. The change in the degree of sleep problems on the composite sleep scale from baseline to week 13 was significant (p < .001) showing that sleep problems reduced during these 13 weeks. The estimated score at baseline was 2.03 (95% CI 1.80–2.27) and it decreased to 1.02 (95% CI 0.76–1.27) at week 13. The with-in group effect size was 0.51 (95% CI 0.33–0.69).